Three people who were in direct contact with the package were taken to the hospital, which is standard procedure and was done “through an abundance of caution,” base officials said. They have since been released, according to the base.

The area around building 258 was cordoned off for specially trained hazardous material personnel, but it has since been reopened for regular traffic.

Spokesman Daryl Mayer said no further information will be released as the investigation into the incident is ongoing.